Living in San Tan Valley, AZ: what to set up and who to call
San Tan Valley has no town government of its own, so Pinal County runs its elections and most services, and its children attend Florence Unified School District. Power in San Tan Valley comes from Salt River Project, a political subdivision utility rather than a private company.
I’m new in town
What to set up in San Tan Valley, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in San Tan Valley.
Power comes from Salt River Project
Salt River Project (Salt River Project), a political subdivision utility, serves all of San Tan Valley. Its homes paid an average of 14.0¢ per kWh in 2025, about $160 a month (its average across Arizona).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Epcor - San Tan water system
The Epcor - San Tan water system supplies San Tan Valley: about 63% of residents live in its service area. Town of Queen Creek serves another 31%. About 6% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 87,435 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 90% of the 597 systems serving 50,001–100,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 0.0 ppb, below the 15 ppb action level that applied. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0. Violations are counted by the start of their compliance period. AZ0411128.
11 home internet providers serve San Tan Valley
100% of 39,617 addresses can get 100/20 Mbps; 84% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Cox Communications | Cable, Fiber | 88% | 2,000/100 |
| Quantum Fiber | Fiber | 73% | 8,000/8,000 |
| Mediacom Xtream | Cable, Fiber | 55% | 1,000/50 |
| CenturyLink | Fiber, DSL | 32% | 8,000/8,000 |
| TREPIC Networks | Fixed wireless, Fiber | 8% | 5,000/5,000 |
| Verizon | Fixed wireless | 45% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have San Tan Valley’s trash rules yet
Pickup rules, the dump and recycling in San Tan Valley.
Where your child goes to school
Public school districts and the school path by grade.
Most of San Tan Valley (79%) is in Florence Unified School District; parts are in J. O. Combs Unified School District (21%).
B−School gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
No town hall: the county runs things
San Tan Valley is unincorporated, so Pinal County is the local government.
Election office: FVAP local election office directory, updated Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
San Tan Valley spans 3 ZIP codes
ZIP codes where San Tan Valley residents live, with the share of the town in each.
| ZIP | Post office name | Share of San Tan Valley | ZIP’s residents in San Tan Valley |
|---|---|---|---|
| 85143 | San Tan Valley, AZ | 41% | 98% |
| 85140 | San Tan Valley, AZ | 37% | 80% |
| 85142 | Queen Creek, AZ | 22% | 28% |
85144 is P.O. box or single-organization ZIP with no homes.
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in San Tan Valley
Who supplies San Tan Valley’s drinking water, and has it had violations?
The Epcor - San Tan water system (EPA ID AZ0411128). It reported no health-based violations to EPA in the five years to October 2026; 90% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in San Tan Valley?
Salt River Project (Salt River Project), a political subdivision utility. Its homes paid about 14.0¢ per kWh in 2025 (EIA).
What internet providers serve San Tan Valley?
Cox Communications, Quantum Fiber, Mediacom Xtream, CenturyLink, TREPIC Networks, Verizon (FCC, as of December 2025).
What ZIP codes are in San Tan Valley?
85143 (41%), 85140 (37%), 85142 (22%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is San Tan Valley in?
Florence Unified School District. Parts of the city are in J. O. Combs Unified School District.
How do I register to vote in San Tan Valley?
In Arizona you can register online until 29 days before Election Day, in person until 29 days before Election Day, or by mail (postmarked 29 days before). Elections here are run by the Pinal County Recorder. Check your registration at my.arizona.vote.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Sep 12, 2025 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.